Google search is a useful alternative to the native forum search for several reasons. Primarily, the forum software search has an imposed restriction on terms of 3 characters or less or terms that are over 20 characters.
This restriction is a performance related measure.

Example:

Searching for carafoam-carapils-maltodextrine will yield the following error.

Sorry - no matches. Please try some different terms.

The following words are either very common, too long, or too short and were not included in your search : carafoam-carapils-maltodextrine

Other common brewing terms that will yield a search error:

O2

Keg

Dry Hop

"Hop Rod Rye"

Note that the inclusion of quotation marks does not matter in the forum search.